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Old 17th June 2004, 12:06 PM   #1
BillyF is offline BillyF  Singapore
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Location: Singapore
Default KBA-75 Help

I need some help from all the Gurus in the forum.
I have this Kinergetics Research KBA-75 Power Amp and there is a slight hum coming out from my speakers (both channel).
Could this be from the power supply?
And when I powered-off, a thug sound can be heared from right to left speaker.
How would I check if both channel were equally biased?
Please advise.
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Old 17th June 2004, 01:01 PM   #2
jmateus is offline jmateus  United States
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Location: US, New Jersey
Default amplifier problem

Yes, most definitly must be the power supply.
You should check it/replace the smoothing capacitors. Also
the ground scheme must be checked.
Good luck
JLH 2005, Cyrus and so on...
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Old 18th June 2004, 12:38 AM   #3
BillyF is offline BillyF  Singapore
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Join Date: Aug 2003
Location: Singapore
Hi jm,
Thanks for your advise.
The smoothing cap you mentioned, are you refering to the bypass caps in thepower supply usually connected parallel with the main filter caps?
How a bout the Thug sound after power-off?
Thanks again,
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